The Secchi disk is a 200mm (20cm) disk with alternating black and white quadrants. It is used to measure water clarity / turbidity by lowering into the water until it can be no longer seen by the human eye. This depth is called the Secchi depth.
Our Secchi Disk includes all stainless steel fittings and a ball weight to maintain the disk position in the water column.
The Secchi Disk is supplied with 25m of Nylon rope.
Please note the Nylon rope does not include measurement or markings.